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Subject[net-next PATCH 2/2] net: macb: Use mdio child node for MDIO bus if it exists
Date
This allows explicitly specifying which children are present on the mdio
bus. Additionally, it allows for non-phy MDIO devices on the bus.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
---

drivers/net/ethernet/cadence/macb_main.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 029dea2873e3..30a65cac9e87 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -898,6 +898,17 @@ static int macb_mdiobus_register(struct macb *bp)
{
struct device_node *child, *np = bp->pdev->dev.of_node;

+ /* If we have a child named mdio, probe it instead of looking for PHYs
+ * directly under the MAC node
+ */
+ child = of_get_child_by_name(np, "mdio");
+ if (np) {
+ int ret = of_mdiobus_register(bp->mii_bus, child);
+
+ of_node_put(child);
+ return ret;
+ }
+
if (of_phy_is_fixed_link(np))
return mdiobus_register(bp->mii_bus);

--
2.25.1
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